Activities/Turtle Art/Using Turtle Art Sensors: Difference between revisions
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===Brightness=== | ===Brightness=== | ||
The average brightness of the image is calculated by the 'brightness' block [[File:Brightblock.jpg]]. As at V106, the camera's automatic gain control (AGC) is still functioning. The camera tries to correct the image brightness to a standard brightness, then calculates the average brightness. The result is a non linear relationship between actual and the measured brightness. Also, some parts of the image are brighter than others further | The average brightness of the image is calculated by the 'brightness' block [[File:Brightblock.jpg]]. As at V106, the camera's automatic gain control (AGC) is still functioning. The camera tries to correct the image brightness to a standard brightness, then calculates the average brightness. The result is a non linear relationship between actual and the measured brightness. Also, some parts of the image are brighter than others further complicates things. Using a diffuser, e.g. translucent material like a plastic bag, may help. | ||
[[File:Brightness.jpg]] | [[File:Brightness.jpg]] | ||